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https://www.readbyqxmd.com/read/28913397/cardiac-transplant-due-to-metal-toxicity-associated-with-hip-arthroplasty
#1
Sheldon Moniz, Sean Hodgkinson, Piers Yates
Concerns regarding metal-on-metal (MoM) bearing couples in total hip arthroplasty are well documented in the literature with cobalt (Co) and chromium (Cr) toxicity causing a range of both local and systemic adverse reactions. We describe the case of a patient undergoing cardiac transplantation as a direct result of Co and Cr toxicity following a MoM hip replacement. Poor implant positioning led to catastrophic wear generating abundant wear particles leading to Co and Cr toxicity, metallosis, bony destruction, elevated metal ion levels, and adverse biological responses...
September 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28910734/single-simultaneous-and-consecutive-biosorption-of-cr-vi-and-orange-ii-onto-chemically-modified-masau-stones
#2
Ahmad B Albadarin, Samuel Solomon, Tonni Agustiono Kurniawan, Chirangano Mangwandi, Gavin Walker
Novel and low cost chemically modified masau stone (CMMS) was investigated for its biosorption of an anionic azo dye, Orange II (OII), and toxic hexavalent chromium (Cr(VI)) from aqueous systems: individually, simultaneously and consecutively. XPS and FTIR analyses indicated the introduction of quaternary-Nitrogen to the CMMS surface after activation with epichlorohydrin (etherifying agent) and diethylenetriamine (crosslinking agent). The effects of pH, contact time and initial concentration (Co), and loading order on mechanisms of biosorption/reduction of OII and Cr(VI) onto CMMS were examined in detail...
September 11, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28906435/mitochondrial-biogenesis-in-response-to-chromium-vi-toxicity-in-human-liver-cells
#3
Xiali Zhong, Rita de Cássia da Silveira E Sá, Caigao Zhong
Hexavalent chromium (Cr(VI)) is a ubiquitous environmental pollutant, which poses a threat to human public health. Recent studies have shown that mitochondrial biogenesis can be activated by inflammatory and oxidative stress. However, whether mitochondrial biogenesis is involved in Cr(VI)-induced hepatotoxicity is unclear. Here, we demonstrated the induction of inflammatory response and oxidative stress, as indicated by upregulation of inflammatory factors and reactive oxygen species (ROS). Subsequently, we demonstrated that mitochondrial biogenesis, comprising the mitochondrial DNA copy number and mitochondrial mass, was significantly increased in HepG2 cells exposed to low concentrations of Cr(VI)...
September 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28904413/hexavalent-chromium-reduction-from-pollutant-samples-by-achromobacter-xylosoxidans-shb-204-and-its-kinetics-study
#4
Swapna Tadishetty Hanumanth Rao, Narendra Kumar Papathoti, Ravi Gundeboina, Yahya Khan Mohamed, Gopal Reddy Mudhole, Hameeda Bee
Cr(VI) is most toxic heavy metal and second most widespread hazardous metal compound worldwide. Present work focused on Cr(VI) reduction from synthetic solutions and polluted samples by Achromobacter xylosoxidans SHB 204. It could tolerate Cr(VI) up to 1600 ppm and reduce 500 ppm with 4.5 chromium reductase enzyme units (U) having protein size 30 kDa. Changes in morphology of cells on interaction with Cr(VI) metal ion was also studied using SEM-EDX and FTIR. Microcosm studies in pollutant samples for Cr(VI) reduction and adsorption isotherm with biomass of bacterium was best fitted with Langmuir model along with kinetic studies...
September 2017: Indian Journal of Microbiology
https://www.readbyqxmd.com/read/28900863/metal-on-metal-hip-joint-prostheses-a-retrospective-case-series-investigating-the-association-of-systemic-toxicity-with-serum-cobalt-and-chromium-concentrations
#5
James H Ho, Jerrold B Leikin, Paul I Dargan, John R H Archer, David M Wood, Jeffrey Brent
INTRODUCTION: There have been concerns about prosthesis failure and the potential for systemic toxicity due to release of cobalt and chromium from metal-on-metal hip joint prostheses (MoM-HP). There is conflicting evidence on whether there is a correlation between higher cobalt and chromium concentrations and systemic toxicity. METHODS: We undertook a retrospective review of consecutive patients with MoM-HP referred for outpatient review in toxicology clinics in London, UK, and in the USA recorded in the Toxicology Investigators Consortium (ToxIC) Registry from June 2011 to June 2015...
September 12, 2017: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/28900147/depletion-of-cr-vi-from-aqueous-solution-by-heat-dried-biomass-of-a-newly-isolated-fungus-arthrinium-malaysianum-a-mechanistic-approach
#6
Rajib Majumder, Lubna Sheikh, Animesh Naskar, Vineeta, Manabendra Mukherjee, Sucheta Tripathy
For the first time, the heat dried biomass of a newly isolated fungus Arthrinium malaysianum was studied for the toxic Cr(VI) adsorption, involving more than one mechanism like physisorption, chemisorption, oxidation-reduction and chelation. The process was best explained by the pseudo-second order kinetic model and Redlich-Peterson isotherm with maximum predicted biosorption capacity (Q m ) of 100.69 mg g(-1). Film-diffusion was the rate-controlling step and the adsorption was spontaneous, endothermic and entropy-driven...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28889025/industrial-pollution-and-cancer-in-spain-an-important-public-health-issue
#7
Pablo Fernández-Navarro, Javier García-Pérez, Rebeca Ramis, Elena Boldo, Gonzalo López-Abente
Cancer can be caused by exposure to air pollution released by industrial facilities. The European Pollutant Release and Transfer Register (E-PRTR) has made it possible to study exposure to industrial pollution. This study seeks to describe the industrial emissions in the vicinity of Spanish towns and their temporal changes, and review our experience studying industrial pollution and cancer. Data on industrial pollutant sources (2007-2010) were obtained from the E-PRTR registries. Population exposure was estimated by the distance from towns to industrial facilities...
September 7, 2017: Environmental Research
https://www.readbyqxmd.com/read/28879636/-cr3o-o2cch2ch3-6-h2o-3-no3%C3%A2-h2o-cr3-toxicity-potential-in-bacterial-and-mammalian-cells
#8
Lu Jiang, John B Vincent, Melissa M Bailey
Chromium(III) has generally been considered to be essential for proper carbohydrate and lipid metabolism, and, despite recent evidence to the contrary, chromium(III)-containing compounds remain one of the most popular commercial dietary supplements. Cr3, or [Cr3O(O2CCH2CH3)6(H2O)3]NO3·H2O, is a trivalent chromium compound that is a promising chromium nutritional supplement. Studies with Cr3 have indicated that it is non-toxic in developmental and short- and long-term exposure studies in rodents, but the safety of this compound to chromosomes and cells has not been explored...
September 7, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28877212/selenium-deficiency-induced-alterations-in-ion-profiles-in-chicken-muscle
#9
Haidong Yao, Xia Zhao, Ruifeng Fan, Hamid Sattar, Jinxin Zhao, Wenchao Zhao, Ziwei Zhang, Yufeng Li, Shiwen Xu
Ion homeostasis plays important roles in development of metabolic diseases. In the present study, we examined the contents and distributions of 25 ions in chicken muscles following treatment with selenium (Se) deficiency for 25 days. The results revealed that in chicken muscles, the top ranked microelements were silicon (Si), iron (Fe), zinc (Zn), aluminum (Al), copper (Cu) and boron (B), showing low contents that varied from 292.89 ppb to 100.27 ppm. After Se deficiency treatment, essential microelements [Cu, chromium (Cr), vanadium (V) and manganese (Mn)], and toxic microelements [cadmium (Cd) and mercury (Hg)] became more concentrated (P < 0...
2017: PloS One
https://www.readbyqxmd.com/read/28871394/the-effects-of-hydraulic-retention-time-hrt-on-chromium-vi-reduction-using-autotrophic-cultivation-of-chlorella-vulgaris
#10
Ling Lee, Chih-Yuan Hsu, Hong-Wei Yen
Chromium is an acutely toxic heavy metal that is known to be a carcinogen. Of the two predominant forms of chromium, Cr(III) and Cr(VI), Cr(III) has only about one thousandth the toxicity of Cr(VI). Using microalgal biomass is one way to remove Cr(VI) from the environment. Four days of hydraulic retention time (HRT) was required to completely reduce 10 mg/L of Cr(VI) in the influent. Microalgal biomass is conventionally regarded as an adsorbent in most Cr(VI) reduction studies. However, this study found that Chlorella vulgaris had the potential to convert Cr(VI) to Cr(III) through the enzymatic route of chromium reductase although the measured chromium reductase activity of C...
September 4, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28870293/characterization-of-multifarious-plant-growth-promoting-traits-of-rhizobacterial-strain-ar6-under-chromium-vi-stress
#11
Chinnannan Karthik, Namasivayam Elangovan, Thamilarasan Senthil Kumar, Subramani Govindharaju, Selvaraj Barathi, Mohammad Oves, Padikasan Indra Arulselvi
Plant growth promoting rhizobacteria (PGPR) can increase the host plant tolerance to cope up with heavy metal induced stress, which can be improve plant growth. Thus, the present study was designed to isolate Cr(VI) tolerant PGPR strain and evaluate its plant growth promoting (PGP) properties under Cr(VI) stress. Rhizobacterial strain AR6 was isolated from the rhizosphere of Phaseolus vulgaris L. and showed 99% homology with Cellulosimicrobium funkei (KM032184) in BLASTn analysis. Strain AR6 was specifically selected due to its high Cr(VI) tolerance (1200μg/ml) and substantial production of PGP substances...
November 2017: Microbiological Research
https://www.readbyqxmd.com/read/28858712/bioaccumulation-of-trace-metals-in-farmed-pacific-oysters-crassostrea-gigas-from-sw-gulf-of-california-coast-mexico
#12
M P Jonathan, N P Muñoz-Sevilla, Andrés Martin Góngora-Gómez, Raquel Gabriela Luna Varela, S B Sujitha, D C Escobedo-Urías, P F Rodríguez-Espinosa, Lorena Elizabeth Campos Villegas
The aim of the study was to evaluate the bioavailability of trace metals (Chromium, Copper, Nickel, Lead, Zinc, Cadmium, Arsenic, and Mercury) in the commercially consumed Crassostrea gigas oysters collected over a 12-month growth period (2011-12) from an experimental cultivation farm in La Pitahaya, Sinaloa State, Mexico. Sediment and water samples were also collected from four different zones adjacent to the cultivation area to identify the concentration patterns of metals. The results revealed that sewage disposals, fertilizers used for agricultural practices and shrimp culture are the major sources for the enrichment of certain toxic metals...
August 22, 2017: Chemosphere
https://www.readbyqxmd.com/read/28842800/reductive-precipitation-and-removal-of-cr-vi-from-groundwaters-by-pipe-flocculation-microfiltration
#13
Stylianos Stylianou, Konstantinos Simeonidis, Manassis Mitrakas, Anastasios Zouboulis, Mathias Ernst, Ioannis A Katsoyiannis
Chromium (Cr(VI)) is a very toxic and carcinogenic element, which is widely present in groundwaters, mainly due to geogenic conditions. The limit of Cr(VI) in drinking water is expected to be reduced to 10 μg/L in both the USA and the European Union. Recent literature findings indicated that the most efficient process in reducing Cr(VI) levels to below 10 μg/L proved to be Cr(VI) reduction by Fe(II), by applying a molar ratio Fe(II)/Cr(VI) of around 9. In the present work, we investigated the reduction of Cr(VI) by Fe(II) in pipe flocculation reactors followed by filtration of insoluble products by microfiltration...
August 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28826748/effects-of-exposure-to-multiple-heavy-metals-on-biochemical-and-histopathological-alterations-in-common-carp-cyprinus-carpio-l
#14
Sivakumar Rajeshkumar, Yang Liu, Junguo Ma, Hong Ying Duan, Xiaoyu Li
Heavy metals are frequently encountered as mixtures of essential and non-essential elements. Therefore, evaluation of their toxic effects individually does not offer a realistic estimate of their impact on biological processes. We studied effects of exposure to mixtures of essential and toxic metals (Cr, Cd and Pb) on biochemical, immunotoxicity level and morphological characteristics of the various tissues of a biomarker freshwater fish common carp using environmentally relevant concentrations. Fish were exposed to metal mixture through tank water for 7, 15 and 30 days, under controlled laboratory conditions...
August 18, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28821464/multi-elemental-nanoparticle-exposure-after-tantalum-component-failure-in-hip-arthroplasty-in-depth-analysis-of-a-single-case
#15
Janosch Schoon, Sven Geißler, Juliane Traeger, Andreas Luch, Jutta Tentschert, Giorgio Perino, Frank Schulze, Georg N Duda, Carsten Perka, Anastasia Rakow
Porous tantalum components are widely used for complex acetabular reconstructions in revision hip arthroplasty. Multiple other metal alloys such as titanium-aluminum-vanadium or cobalt-chromium-molybdenum are principally used in artificial joint setups. We report a case of tantalum component failure being both cause and effect of a multiple metal exposure. Our aims were to assess and to characterize associated particle exposure and biological consequences. Metal level quantification revealed substantial in vivo exposure to particulate and dissociated tantalum, zirconium, chromium, cobalt, molybdenum, titanium, aluminum and vanadium in periprosthetic compartments...
August 16, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28810231/cr-induced-cellular-injury-and-necrosis-in-glycine-max-l-biochemical-mechanism-of-oxidative-damage-in-chloroplast
#16
Kalimuthu Balasaraswathi, Sivalingam Jayaveni, Janardhanam Sridevi, Dhanasingh Sujatha, Kavati Phebe Aaron, Chellan Rose
Chromium-induced toxicity and mechanisms of cell death involved in plants are yet to be fully elucidated. To understand the events of these processes, the stress response of the soybean plant using trivalent and hexavalent chromium compounds, namely, basic chromium sulphate (BCS) and potassium dichromate (K2Cr2O7) was investigated. The leaf surface morphology for stomatal aperture, wax deposition and presence of trichomes for chromium accumulation was examined by SEM-EDAX and light microscopy. The leaf mesophyll cell integrity was identified by trypan blue staining; chlorophyll autofluorescence, ROS generation and mitochondrial function were studied by fluorescence microscopy using different dyes...
August 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28809623/how-to-choose-between-the-implant-materials-steel-and-titanium-in-orthopedic-trauma-surgery-part-2-biological-aspects
#17
S M Perren, P Regazzoni, A A Fernandez
BIOLOGICAL ASPECTS OF STEEL AND TITANIUM AS IMPLANT MATERIAL IN ORTHOPEDIC TRAUMA SURGERY The following case from the ICUC database, where a titanium plate was implanted into a flourishing infection, represents the clinical experience leading to preferring titanium over steel. (Fig. 1) (6). Current opinions regarding biological aspects of implant function. The "street" opinions regarding the biological aspects of the use of steel versus titanium as a surgical trauma implant material differ widely. Statements of opinion leaders range from "I do not see any difference in the biological behavior between steel and titanium in clinical application" to "I successfully use titanium implants in infected areas in a situation where steel would act as foreign body "sustaining" infection...
2017: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28809442/simultaneous-degradation-and-removal-of-cr-vi-from-aqueous-solution-with-zr-based-mofs-bearing-inherent-reductive-sites
#18
Zhe Wang, Jian Yang, Yongsheng Li, Qixin Zhuang, Jinlou Gu
Given the serious harm of chromium Cr(VI) to human health, development of efficient techniques for its degradation and subsequent in situ adsorptive removal is highly desirable. Herein, UiO-66 type MOFs integrated with various hydroxyl groups (UiO-66, UiO-66-OH, and UiO-66-(OH)2) were successfully explored for the efficient decontamination of Cr(VI) from aqueous solution. The abundant hydroxyl groups in organic ligands not only served as reductive sites for the degradation of Cr(VI) to less toxic Cr(III) but also acted as inherent anchorages for the efficient capture of Cr(III)...
August 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28791837/the-role-of-17%C3%AE-estradiol-metabolites-in-chromium-induced-oxidative-stress
#19
Ewa Sawicka, Anna Długosz
BACKGROUND: The increasing incidence of estrogen-dependent breast cancer and the presence in the environment of a large number of factors that interact with estrogen receptors have sparked interest in chemical influences on estrogen-dependent processes. In a previous work, the authors examined the interaction of estradiol with chromium. In the present article the importance of estradiol biotransformation in these interactions is investigated. There is no information in the available literature about the role of metabolites in exposure to chromium...
March 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28755953/kidney-toxicity-related-to-herbs-and-dietary-supplements-online-table-of-case-reports-part-3-of-5-series
#20
REVIEW
Amy Christine Brown
BACKGROUND: No tabular summary of potentially life-threatening, kidney-toxic dietary supplements (DS; includes herbs) based on PubMed case reports is currently available online and continually updated to forewarn United States consumers, clinicians, and companies manufacturing DS. The purpose of this review was to create an online research summary table of kidney toxicity case reports related to DS. METHODS: Documented PubMed case reports (1966 to May 2016, and cross-referencing) of DS appearing to contribute to kidney toxicity were listed in "DS Toxic Tables...
September 2017: Food and Chemical Toxicology
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